<template>
    <div>
         <!-- 用户列表组件  面包些导航 -->
         <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/welcome' }">后台首页</el-breadcrumb-item>
            <el-breadcrumb-item >权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>权限列表</el-breadcrumb-item>
         
          </el-breadcrumb>

          <!-- 卡片视图 -->
<el-card>
 <!-- 警告注意页面 -->
 <el-alert
    title="注意，只允许为第三级分类设置相关参数！"
    type="error"
    show-icon
    :closable="false"
    center
    >
  </el-alert>
  <!-- 选择商品分类区域 -->
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
          <!-- <el-cascader v-model="selectedCateKeys" :options="cateList" :props="{ expandTrigger: 'hover'， ...cateProps }" @change="handleChange"></el-cascader> -->
      
       <el-cascader :v-model="selectedCateKeys" :options="cateList" :props="{ expandTrigger: 'hover', ...cateProps }" @change="handleChange"></el-cascader>
  </el-row>

  <!-- tab标签页签区域 -->
  <el-tabs v-model="activeName" @tab-click="handleTabClick">
      <!-- 第一个是添加动态参数的面板  第二个是静态属性 -->
    <el-tab-pane label="动态参数" name="many">
        <el-button type="primary" size="mini"  @click="addDialogVisible=true">添加参数</el-button>
        <!-- 动态参数表格 -->
        <el-table :data="manyTableData" border stripe></el-table>
        <!-- 展开行 -->
        <el-table-column type="expand">
            <template v-slot="scope">
                <!-- 循环渲染tag标签 -->
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                <!-- 输入文本框 -->
                <el-input
  class="input-new-tag"
  v-if="scope.row.inputVisible"
  v-model="scope.row.inputValue"
  ref="saveTagInput"
  size="small"
  @keyup.enter.native="handleInputConfirm(scope.row)"
  @blur="handleInputConfirm(scope.row)"
>
</el-input>
<!-- 添加的按钮 -->
<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
            </template>
</el-table-column>
<!-- 索引列 -->
<el-table-column type="index"></el-table-column>
<el-table-column label="参数名称" prop="attr_name"></el-table-column>
<el-table-column label="操作">
    <!-- 作用域插槽 -->
    <template v-slot="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                  
              </template>
</el-table-column>
</el-tab-pane>
<el-tab-pane label="静态属性" name="only">
    <el-button type="primary" size="mini" @click="addDialogVisible=true">添加参数</el-button>
    <!-- 静态属性表格 -->
    <el-table :data="onlyTableData" border stripe></el-table>
    <!-- 展开行 -->
    <el-table-column type="expand">
        <template v-slot="scope">
            <!-- 循环渲染tag标签 -->
            <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
            <!-- 输入文本框 -->
            <el-input
class="input-new-tag"
v-if="scope.row.inputVisible"
v-model="scope.row.inputValue"
ref="saveTagInput"
size="small"
@keyup.enter.native="handleInputConfirm(scope.row)"
@blur="handleInputConfirm(scope.row)"
>
</el-input>
<!-- 添加的按钮 -->
<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
        </template>
    </el-table-column>
    <!-- 索引列 -->
    <el-table-column type="index"></el-table-column>
    <el-table-column label="属性名称" prop="attr_name"></el-table-column>
    <el-table-column label="操作">
        <!-- 作用域插槽 -->
        <template v-slot="scope">
               <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
               <el-button type="danger" icon="el-icon-delete" size="mini" @clcik="removeParams(scope.row.attr_id)">删除</el-button>
                 
             </template>
    </el-table-column>
</el-tab-pane>

</el-tabs>
</el-card>

<!-- 添加参数的对话框 -->
<el-dialog :title="'添加'+titleText" :visible.sync="addDialogVisible" width="50%" @click="addDialogClosed">
    <!-- //添加参数的对话框 -->
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item label="titleText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
    </el-form>
    <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
</el-dialog>

<!-- 修改参数的对话框 -->
<el-dialog :title="'修改'+titleText" :visible.sync="editDialogVisible" width="50%" @click="editDialogClosed">
    <!-- //添加参数的对话框 -->
    <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item label="titleText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
    </el-form>
    <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
</el-dialog>


</div>
</template>


<script>
    export default {
        data() {
            return {
                //商品分类列表
                cateList: [],
                //级联选择框的配置对象
                cateProps: {
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children'
                },
                //级联选择框双向绑定到的数组
                selectedCateKeys: [],
                //被激活的页签的名称
                activeName: 'many',
                //动态参数的数据
                manyTableData: [],
                //静态属性的数据
                onlyTableDate: [],
                //控制添加对话框的显示与隐藏
                addDialogVisible: false,
                //添加参数的表单数据 
                addForm: {
                    attr_name: ''
                },
                // 给相关的参数格式校验
                // element ui有相关写法
                addFormRules: {
                    attr_name: [{
                        required: true,
                        message: '请输入参数名称',
                        trigger: 'blur'
                    }, ]
                }, //控制修改对话框的显示与隐藏
                editDialogVisible: false,
                //修改的表单数据对象

                editForm: {},
                //修改表单的验证规则对象
                editFormRules: {
                    attr_name: [{
                        required: true,
                        message: '请输入参数名称',
                        trigger: 'blur'
                    }, ]
                },

            }
        },
        created() {
            this.getCateList()
        },
        methods: {
            // 获取所有商品分类的数据
            async getCateList() {
                const {
                    data: res
                } = await this.$http.get('categories')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取商品分类失败!')
                }
                this.$message.success('获取商品分类成功')
                this.cataList = res.data
                console.log(this.cateList)
            },
            //级联选择框选中项变化 会触发
            handleChange() {
                this.getParamsData()
            },
            //tab页签点击事件的处理函数
            handleTabClick() {
                console.log(this.activeName);
                this.getParamsData()
            },
            //获取参数的列表数据
            async getParamsData() {
                // console.log(this.selectedCateKeys);
                if (this.selectedCateKeys.length !== 3) {
                    //证明选中的不是三级分类  那么立即把这个数组情况 并且return出去
                    this.selectedCateKeys = []
                        // 将下面两个也情况选一级那些就不会没清空情况
                    this.manyTableData = []
                    this.onlyTableDate = []
                    return
                }
                //证明选中的是三级分类
                console.log(this.selectedCateKeys);
                //根据所选分类的id和当前所处的面板  获取对应的参数
                //通过 only 或 many 来获取分类静态参数还是动态参数 sel
                const {
                    data: res
                } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: {
                        sel: this.activeName
                    }
                })
                if (res.meta.satus !== 201) {
                    return this.$message.error('获取参数列表失败！')
                }

                // 在赋值之前我们应该将里面的每一项做一次循环
                res.deta.forEach(item => {
                    item.attr_vals = item.attr_vals ? item.attr_vals.split('') : []
                        //控制文本框的显示与隐藏  添加下面的内容 这样拿去引用  每一行数据都有
                        //自己的两个相关
                    item.inputVisible = false
                    item.inputValue = ''
                })
                console.log(res.data);
                if (this.activeName === 'many') {
                    this.manyTableData = res.data
                } else {
                    this.onlyTableDate = res.data
                }
            },
            //监听添加对话框的关闭事件
            addDialogClosed() {
                this.$refs.addFormRef.resetFields()
            },

            //点击按钮添加参数  添加之前的做表单的预验证
            addParams() {
                this.$refs.addFormRef.validate(async valid => {
                    if (!valid) return
                    const {
                        data: res
                    } = await this.$http.post(`categories/${this.cateId}/attributes`, {
                        attr_name: this.addForm.attr_name,
                        attr_sel: this.activeName
                    })
                    if (res.meta.status !== 201) {
                        return this.$message.error('添加参数失败！')
                    }
                    this.$message.success('添加参数成功！')
                    this.addDialogVisible = false
                    this.getParamsData()
                })
            }, //点击按钮展示修改对话框 可以传递参数scope.row.attr_id
            async showEditDialog(attr_id) {
                //查询当前参数的信息
                const {
                    data: res
                } = await this.$http.get(`categories/${this.cateId}/attributes/$(attr_id)`, {
                    params: {
                        attr_sel: this.this.activeName
                    }
                })
                if (res.meta.status !== 200) {
                    return this.$message.error('获取参数信息失败！')
                }
                this.editForm = res.data

                this.editDialogVisible = true
            },
            //清空重置表单的操作
            editDialogClosed() {
                this.$refs.editFormRef.resetFields()
            },
            //点击确定按钮修改参数信息
            editParams() {
                this.$refs.editFormRef.validate(async valid => {
                    if (!valid) return
                    const {
                        data: res
                    } = await this.$http.put(`categories/${this.cateId}/attributes/$(this.editForm.attr_id)`, {
                        attr_name: this.editForm.attr_name,
                        attr_sel: activeName
                    })
                    if (res.meta.status !== 200) {
                        return this.$message.error('修改参数失败！')
                    }
                    this.$message.success('修改参数成功！')
                        //同时刷新参数数据列表
                    this.getParamsData()
                        // 同时要隐藏对话框
                    this.editDialogVisible = false
                })
            },
            //根据id删除对应的参数项  要弄个弹框 就用element UI里的messageBox
            async removeParams(attr_id) {
                const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)
                if (confirmResult !== 'confirm') {
                    return this.$message.info('已取消删除！')
                }
                //删除的业务逻辑
                this.$http.delete(` categories/$(this.cateId)/attributes/$(attr_id)`)
            }, //文本框失去焦点或者按下enter键都会触发
            async handleInputConfirm(row) {
                if (row.inputValue.trim().length === 0) {
                    row.inputValue = ''
                    row.inputVisible = false
                    return
                }
                row.attr_vals.push(row.inputValue.trim())
                row.inputValue = ''
                row.inputVisible = false
                    //需要发起请求 保存这次操作
                const {
                    data: res
                } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
                    attr_name: row.attr_name,
                    attr_sel: row.attr_sel,
                    attr_vals: row.attr_vals.join('')
                })
                if (res.meta.status !== 20) {
                    return this.$message.error('修改参数失败！')
                }
                this.$message.success('修改参数成功！')
                    //如果没有return 则证明输入的内容需要做后续处理
            },
            //点击按钮展示文本输入框
            showInput(row) {
                row.inputVisible = true

                this.$nextTick(_ => {
                    this.$refs.saveTagInput.$refs.input.focus();
                });
            },
            //删除对应的操作和选项
            handleClose(i, row) {
                row.attr_vals.splice(i, 1)
                this.saveAttrVals(row)
            },
            //保存参数数据操作
            async saveAttrVals(row) {
                const {
                    data: res
                } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
                    attr_name: row.attr_name,
                    attr_sel: row.attr_sel,
                    attr_vals: row.attr_vals.join('')
                })
                if (res.meta.status !== 20) {
                    return this.$message.error('修改参数失败！')
                }
                this.$message.success('修改参数成功！')
            }
        },
        //添加计算
        computed: {
            //如果按钮需要被禁用，则返回true 否则返回false  渲染都没法渲染还禁用个p
            // isBtnDisabled() {
            //     if (this.selectedCateKeys.length !== 3) {
            //         return true
            //     }
            //     return false
            // },
            //当前选中的三级分类的id
            cateId() {
                if (this.selectedCateKeys.length === 3) {
                    return this.selectedCateKeys[2]
                }
                //没有选择就返回一个空值
                return null
                this.$message.error('级联选择器错误无法选中id')
            },
            //动态计算标题的文本
            titleText() {
                if (this.activeName === 'many') {
                    return '动态参数'
                }
                return '静态属性'
            }
        }
    }
</script>

<style lang="less" scoped>
    .cat_opt {
        margin: 15px 0;
    }
    
    .el-tag {
        margin: 8px;
    }
    
    .input-new-tag {
        width: 120px;
    }
</style>